Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 42 for “"Demographic history"”.
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Population Structure and Demographic History of Human Arctic Populations Using Quantitative Cranial Traits
The Arctic of North America provides an excellent laboratory for examining human population movement and differentiation. This research utilizes cranial morphological variation from 27 discrete Arctic populations spread across the North American Arctic to examine the role that culture and migration …
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Investigating the genetic diversity, population structure and archaic admixture history in worldwide human populations using high-coverage genomes
… reveals fine scale structures and recent demographic history that vary between populations. This dataset also provides a valuable opportunity to explore the diversity and distribution of archaic segments in modern human populations. I implemented a hidden Markov model to detect such …
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Invasion genomics, adaptive evolution, and transcriptional plasticity of Anopheles stephensi in Ethiopia and Yemen : implications for malaria transmission and control.
… population structure, connectivity, and recent demographic history, and identifies loci under positive selection associated with insecticide resistance and urban adaptation. Complementary larval RNA sequencing from Ethiopian populations demonstrates that local environmental conditions drive …
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Human population history and genetic adaptation in the Himalayan region
… sequences and functional studies to explore the demographic history, genetic structure and signatures of adaptation in Himalayan populations. Eight hundred and eighty three individuals from 49 different autochthonous groups from Nepal, Bhutan, North India, and the Tibetan Plateau in China were …
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POPULATION GENETICS OF COWNOSE RAYS, RHINOPTERA SPP. IN THE WESTERN ATLANTIC
… difference between the three regions. The demographic history of both species was investigated using neutrality tests and indicated an evolutionarily recent population expansion.</p>
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Evolutionary Genomics of Populus trichocarpa (Western Poplar)
… contemporary climate change, but also historical demographic events, and disentangling the role of these forces is a central problem in population genomics. The overall goal of this study is to characterize the relative effects of demography and selection in the genome of Populus trichocarpa, a …
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Evaluating the Adaptive Genomic Landscape of Remnant and Backcross American Chestnut Populations to Inform Germplasm Conservation
… the genomic diversity, population structure, and demographic history of remnant wild American chestnut populations; 2) revealed the genomic basis of local climate adaptation in American chestnut, developed a novel method to make tree sampling estimates for germplasm conservation, and defined …
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The Conservation Genetics of Two Emydid Turtles: <i>Emydoidea blandingii</i> and <i>Malaclemys terrapin</i>
… diversity, population structure, paternity and demographic history in two emydid turtles that are currently experiencing threats to their survival. The Blanding’s turtle, <em>Emydoidea blandingii</em>, has experienced habitat fragmentation throughout its range, and this study focuses on a …
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Haplotype-Based Approaches For The Study Of Human Evolution
… and a key factor in understanding recent demographic history.
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Childhood epidemics and the demographic landscape of the Aland Archipelago
… that this disease may have larger impacts on the demographic history of populations than previously thought. This study uses archival records to investigate syndemic interactions between measles and other diseases during a 19th century measles epidemic in the Aland Islands, Finland. Comparisons to …
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Evolution of Endosperm Starch Synthesis Pathway genes in the Context of Rice: Oryza sativa) Domestication
… selection is often caused by the complex demographic history of a species. Genome-wide sequence data in a species would mainly reflect its demographic history. I have compared the pattern of nucleotide variation at each starch gene with published genome-wide sequence data and with a …
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Factors associated with different responses to combination antiretroviral therapy in an observational cohort study of HIV-1 infected patients
… Israel and Argentina. Data collected includes demographic history, CD4 cell counts, viral loads and details of all drugs taken. EuroSIDA also collects viral sequence data for its resistance database. Investigation into virological response to first-line cART across geographical regions found …
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Evolutionary forces shaping innate immune gene variation in a bottlenecked population of the Seychelles warbler
… in this population and show that this species’ demographic history has had an overriding effect on selection and random drift is the predominant evolutionary force. I characterise variation within these gene groups across several other Acrocephalus species, in addition to looking at a specific …
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The spatial scale of immune gene variation within and among bottlenecked populations
… that the pipits inhabit. I found that while demographic history has played the major role in shaping patterns of among population variation at toll-like receptor loci, balancing selection (possibly pathogen-mediated) appears to have helped maintain functional variation at some specific loci. …
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Genetic inference of deep hominin evolutionary history using the sequentially Markovian coalescent
… has allowed researchers to infer human demographic history with unprecedented resolution. Of particular interest are the series of population size changes, admixture events, and adaptations that have occurred over time. Many methods that infer these quantities rely on differences in the …
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Fitting Stochastic Epidemic Models to Multiple Data Types
… genetics tools that aim at reconstructing demographic history of a population based on molecular sequences of individuals sampled from the population of interest. In this thesis, we aim at designing a general framework that can fit stochastic epidemic models to surveillance count data and …
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On the origin and spread of horse domestication
… groundwork for a more thorough analysis into the demographic history of horses. I then investigate the origin and mode of spread of horse domestication in the Eurasian steppe region using a spatially explicit genetic model. I show that horse domestication was initiated in the western part of the …
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Causes and consequences of genetic diversity in pinnipeds
… genetics now allows us to glimpse into the demographic history of a species and gain insights into its population dynamics during the last glacial period or the impact of recent bottlenecks caused by human exploitation. Measuring genetic variation is also key to exploring the forces shaping …
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Population genetics and systematics of a species-rich clade of Neotropical reef fishes, the tubeblenny genus Acanthemblemaria
… sequence data I was able to recover the complex demographic history of two closely related Acanthemblemaria species, A. aspera and A. spinosa. Old population expansions in both species were obscured by a rapid mitochondrial substitution rate, but the mitochondrial DNA allowed the recovery of a …
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